Rokkala,
As far as I know, if there is information provided in the eye prescription box, NATS will consider it and may ask you to provide more details, see one of the company doctors, etc before progressing your application. It shouldn't just go straight in the no pile - the same system applies to those outside the height range - tall and small controllers are ok, but they need to measure certain things to make sure everyone can fit under the desks!